论文部分内容阅读
研究了含有W、V的Fe-Cr-Mn奥氏体合金,经电子线辐照后析出相—基体相界面诱起溶质原子偏析行为。实验结果表明:合金中析出相为富Cr的M_(23)C6型碳化物。晶内析出相经辐照相界面处Cr的浓度增加,Mn的浓度降低。而晶界上和晶界近傍析出相的相界面Cr的浓度降低。合金元素Cr浓度的不同变化是与辐照诱起晶界偏析机构改变有关。 本文对此现象,应用辐照诱起晶界偏析理论,提出两种偏析机构的模型,较好的解释上述实验结果。
The austenitic Fe-Cr-Mn alloys containing W and V were investigated. The segregation behavior of solute atoms was induced by the phase-to-matrix interface precipitated by the electron beam. The experimental results show that the precipitated phase is Cr-rich M_ (23) C6 carbides. The concentration of Cr in the precipitated phase at the irradiated phase increases with the decrease of Mn concentration. While the grain boundary and the grain boundary near precipitation phase phase interface Cr concentration decreased. The variation of Cr concentration of alloying elements is related to the change of grain boundary segregation mechanism induced by irradiation. In this paper, the phenomenon of grain boundary segregation induced by irradiation is proposed, and two models of segregation mechanism are proposed to better explain the above experimental results.